import tornado.ioloop
import tornado.web

class Hellohandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello Tornado!")
        
    
app = tornado.web.Application([
        (r"/",Hellohandler),
        ])
        
if __name__ =="__main__":
    app.listen(8000)
    tornado.ioloop.IOLoop.current().start()
    

